( 511 ) 



was not altered tliereby. Both preparations could also be converted 

 readily into 2-6-dibromo-4-nitroplienol m.p. 141° by treatment with 

 bromine water ^). 



The following reactions were applied : 



OH OH 



N02 N03 



NHo 

 NO^yXcN 



NO., 



This proved that the constitution of the oxymethyldinitrobenzonitrile 

 prepared by Van Geuns is C,H,(OCH,), CN, (NO,),. 1, 2, 3, 4. 



At the same time it was shown that the movable NO, -group in 

 this substance is placed at 3 ; consequently we now know the 

 constitution of the compounds obtained from it by substitution of 

 the NO,-group by OH, OCH, etc. 



Finally, the consiitution was determined of the dinitrodimethoxy- 

 benzonitrile obtained by the nitration of 0, H, (OCHg), CN J, 3, 2, or 

 of the nitrodimethoxybenzonitrile C«H, (OCH3), CN. NO, 1,3, 2, 4.=). 



This compound was converted into 4-6-dinitro-resorcine m.p. 215" 

 by being heated for 5 hours at 150^— 160^ with hydrochloric 

 acid (30 7„ HCl) ; from this follows that its constitution is 

 C«H (OCH3), CN (NO,), 1. 3. 2. 4. 6. 



4.6 dinitro-2-cyano 1.3 dimethoxy benzene on treatment with alcoholic 

 ammonia or methylamine readily yields compounds which perfectly 

 resemble the compounds which have been obtained in a similar 

 manner from 2.4.6 trinitroresorcinoldimethylether. 



CH3 NO., 



OCH3 NH2 NH NCÏI3 



NO2/ \CN NO2/ \CN NO.,/ \CN NO2X \CN 



I 81° I -^ \2n°\ \2-Si°\ jj -» |204o| ^^^ 



()CH3 \ /NH., \/^CH3 \/^ChJ 



NO2 NO2 NO2 NO3 



1) Lellmann and Grothmann. Ber. 17, 2731, 

 ~) Dissertation Van Geuns. p. 69, 



